(19)
(11) EP 4 199 233 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.07.2023 Bulletin 2023/29

(43) Date of publication A2:
21.06.2023 Bulletin 2023/25

(21) Application number: 22213289.6

(22) Date of filing: 13.12.2022
(51) International Patent Classification (IPC): 
H01M 50/446(2021.01)
H01M 50/403(2021.01)
H01M 50/417(2021.01)
H01M 50/434(2021.01)
 H01M 10/052(2010.01)
H01M 50/414(2021.01)
H01M 50/426(2021.01)
H01M 50/449(2021.01)
(52) Cooperative Patent Classification (CPC):
H01M 50/446; H01M 50/449; H01M 50/403; H01M 50/434; H01M 50/426; H01M 50/414; H01M 50/417; H01M 10/052
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
KH MA MD TN

(30) Priority: 14.12.2021 KR 20210178418

(71) Applicant: SK On Co., Ltd.
Seoul 03161 (KR)

(72) Inventors:
  • HWANG, Chang Mook
    34124 Daejeon (KR)
  • NAM, Yae Seol
    34124 Daejeon (KR)
  • LEE, Jong Hyeok
    34124 Daejeon (KR)
  • JO, Yoon Ji
    34124 Daejeon (KR)

(74) Representative: Stolmár & Partner Patentanwälte PartG mbB 
Blumenstraße 17
80331 München
80331 München (DE)

   


(54) SEPARATOR FOR SECONDARY BATTERY, METHOD OF MANUFACTURING THE SAME, AND SECONDARY BATTERY INCLUDING THE SAME


(57) Exemplary embodiments of the present disclosure provide a separator for a secondary battery, capable of preventing heat from transferring to an adjacent region in an electrode even when non-ideal heat is generated by an electrode active material, a trigger point of thermal runaway.
A separator for a secondary battery according to the present disclosure includes a porous polymer substrate and a ceramic layer provided on at least one surface of the porous polymer substrate. The ceramic layer includes a ceramic composite. The ceramic composite includes a hollow portion, a ceramic shell surrounding the hollow portion, and a doping material dispersed in the ceramic shell. The hollow portion is in a vacuum state.







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